package com.example.controller;


import com.example.common.R;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.UUID;

@RestController
@RequestMapping("/common")
public class CommonController {


    @Value("${order.path}")
    private String filePath;

    @PostMapping("/upload")
    public R<String> upload(MultipartFile file) {

        String originalFilename = file.getOriginalFilename();

        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));

        String name = UUID.randomUUID().toString() + suffix;

        File dest = new File(filePath);

        if(!dest.exists()){
            dest.mkdirs();
        }
        try {
            file.transferTo(new File(filePath+ name));
        } catch (IOException e) {
            e.printStackTrace();
        }

        return R.success(name);
    }

    @GetMapping("/download")
    public void download(String name, HttpServletResponse response) {

        try {
            FileInputStream fis = new FileInputStream(new File(filePath + name));

            ServletOutputStream servletOutputStream = response.getOutputStream();

            response.setContentType("image/jpeg");
            int len=0;

            byte[] bytes = new byte[1024];
            while((len=fis.read(bytes))!=-1){

                servletOutputStream.write(bytes,0,len);
                servletOutputStream.flush();
            }

            fis.close();
            servletOutputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }



}
